Patents by Inventor Eiko Tanaka

Eiko Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210355266
    Abstract: The present invention provides a coating film having a structure represented by the following general formula (1) (in the formula, R11 is a residue formed by removing one isocyanate group from a polyisocyanate, and R12 is an alkyl group or an alkoxy group having 2 to 12 carbon atoms, R13 is a residue formed by removing one hydroxyl group from a polyol), wherein a K├Ânig hardness of the coating film is 20 or more, in an SS curve measurement of a tensile test, the coating film has an elastic deformation region and a plastic deformation region, and in the SS curve measurement, a stress at an inflection point stress between the elastic deformation region and the plastic deformation region is 5 MPa or more.
    Type: Application
    Filed: October 31, 2019
    Publication date: November 18, 2021
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Eiko TANAKA, Koichiro AZUMA
  • Publication number: 20200308338
    Abstract: A blocked polyisocyanate composition containing a blocked polyisocyanate obtained from a polyisocyanate and at least one blocking agent, wherein the blocking agent contains a compound represented by general formula (I) shown below, and the amount of methane tetracarbonyl structures represented by general formula (II) shown below, relative to the total molar amount within the blocked polyisocyanate of bonded structures in which the compound represented by general formula (I) is bonded to the polyisocyanate, is at least 0.5 mol % but not more than 10 mol %.
    Type: Application
    Filed: September 27, 2018
    Publication date: October 1, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Eiko TANAKA, Yuichi MIWA, Masakazu YAMAUCHI, Kie SHINOMIYA
  • Publication number: 20180093524
    Abstract: A mechanical pencil includes a main body in which a mechanism for discharging a pencil lead is located, and a clip attached to the main body wherein the clip includes a container for storing a refill for a pencil lead.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 5, 2018
    Inventors: Ryo SHIRANE, Eiko TANAKA, Ryo KAWAMURA, Masako OKUYAMA, Rei TAKAHASHI, Honami YAMAZAKI, Koyo USHIKI, Hikaru IKEDA
  • Patent number: 8182860
    Abstract: The present invention provides dental fillers having the optical and/or mechanical characteristics required to dental materials, a method of producing the same, and a dental composite material prepared with use of the dental filler. More specifically, the present invention provides a dental filler containing a zirconium silicate compound, especially a zirconium trisilicate compound with a wadeite type crystalline structure and having an average particle diameter in the range from 2 to 50,000 nm, a method of producing the same, a dental composite material containing the dental filler and a hardenable resin selected from an acrylic resin, a methacrylic resin, an epoxy resin, a vinyl resin, a urethane resin and the like.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: May 22, 2012
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Keisuke Ohtsuka, Yoshifumi Miyano, Hirokazu Tanaka, Eiko Tanaka, legal representative
  • Patent number: 7981513
    Abstract: A dental filler having the optical and/or mechanical properties satisfying the requirements to a dental material, a method for producing the dental filler, and a dental composite material containing the dental filler. The dental filler comprises microparticles of amorphous inorganic oxide constituted by at least silica-based fine particles covered with a composite oxide comprising zirconium, silicon and oxygen. The dental composite material contains the dental filler and a hardenable resin selected from an acrylic resin, a methacrylic resin, an epoxy resin, a vinyl resin and a urethane resin.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: July 19, 2011
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Keisuke Ohtsuka, Hirokazu Tanaka, Eiko Tanaka, legal representative
  • Patent number: 7978409
    Abstract: The hard coat layer-forming composition of this invention includes (A) composite oxide fine particles with a mean particle diameter of 1 to 200 nm, containing titanium, tin and optionally silicon, and with a rutile-type crystal structure, (B) an organosilicon compound represented by the formula R1aR2bSi(OR3)4?(a+b) and/or a hydrolyzate thereof, and (C) a cyanamide derivative compound. A hard coat layer formed from the composition not only is excellent in transparency, scratch resistance, adhesion property, weathering resistance, impact resistance, etc. but also can enjoy no coloration or little coloration, particularly in bluing or yellowing, upon exposure to or irradiation with ultraviolet rays, even if an antireflection film is provided.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: July 12, 2011
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Hirokazu Tanaka, Eiko Tanaka, legal representative, Sachio Murai, Hideki Ito, Yoshifumi Miyano
  • Publication number: 20100058955
    Abstract: The hard coat layer-forming composition of this invention includes (A) composite oxide fine particles with a mean particle diameter of 1 to 200 nm, containing titanium, tin and optionally silicon, and with a rutile-type crystal structure, (B) an organosilicon compound represented by the formula R1aR2bSi(OR3)4?(a+b) and/or a hydrolyzate thereof, and (C) a cyanamide derivative compound. A hard coat layer formed from the composition not only is excellent in transparency, scratch resistance, adhesion property, weathering resistance, impact resistance, etc. but also can enjoy no coloration or little coloration, particularly in bluing or yellowing, upon exposure to or irradiation with ultraviolet rays, even if an antireflection film is provided.
    Type: Application
    Filed: October 17, 2006
    Publication date: March 11, 2010
    Applicant: CATALYSTS & CHEMICALS INDUSTRIES CO., LTD.
    Inventors: Hirokazu Tanaka, Eiko Tanaka, Sachio Murai, Hideki Ito, Yoshifumi Miyano
  • Publication number: 20100056664
    Abstract: A dental filler having the optical and/or mechanical properties satisfying the requirements to a dental material, a method for producing the dental filler, and a dental composite material containing the dental filler. The dental filler comprises microparticles of amorphous inorganic oxide constituted by at least silica-based fine particles covered with a composite oxide comprising zirconium, silicon and oxygen. The dental composite material contains the dental filler and a hardenable resin selected from an acrylic resin, a methacrylic resin, an epoxy resin, a vinyl resin and a urethane resin.
    Type: Application
    Filed: September 13, 2007
    Publication date: March 4, 2010
    Applicant: JGC CATALYSTS & CHEMICALS LTD.
    Inventors: Keisuke Ohtsuka, Hirokazu Tanaka, Eiko Tanaka
  • Publication number: 20090253825
    Abstract: The present invention provides dental fillers having the optical and/or mechanical characteristics required to dental materials, a method of producing the same, and a dental composite material prepared with use of the dental filler. More specifically, the present invention provides a dental filler containing a zirconium silicate compound, especially a zirconium trisilicate compound with a wadeite type crystalline structure and having an average particle diameter in the range from 2 to 50,000 nm, a method of producing the same, a dental composite material containing the dental filler and a hardenable resin selected from an acrylic resin, a methacrylic resin, an epoxy resin, a vinyl resin, a urethane resin and the like.
    Type: Application
    Filed: February 23, 2007
    Publication date: October 8, 2009
    Inventors: Keisuke Ohtsuka, Yoshifumi Miyano, Eiko Tanaka
  • Publication number: 20090136746
    Abstract: A composite polymer is obtained by reacting (a) an elastomer having a carboxyl group with (b) metal oxide fine particles each having an epoxy ring-containing group on the particle surface. A thermally cured product of the composite polymer is a material favorable for forming a primer layer which has not only high transparency but also excellent adhesion to a hard coat layer and is excellent also in scratch resistance, heat resistance, weathering resistance, dyeing property, impact resistance and the like. An article such as an optical article whose primer layer comprises the thermally cured product of the composite polymer has high transparency and is excellent also in heat resistance.
    Type: Application
    Filed: August 11, 2006
    Publication date: May 28, 2009
    Applicant: CATALYSTS & CHEMICALS INDUSTRIES CO., LTD.
    Inventors: Sachio Murai, Hideki Ito, Yoshifumi Miyano, Hirokazu Tanaka, Eiko Tanaka
  • Publication number: 20090029153
    Abstract: Disclosed herein is a plastic lens which exhibits outstanding weather resistance and light resistance with a minimum of deteriorating effect on the organic antireflection thin film formed thereon. The plastic lens is composed of a plastic lens base material, a hard coating layer formed on the plastic lens base material, and an antireflection film formed on the hard coating layer, wherein the hard coating layer is one which is formed from a coating composition comprising inorganic oxide fine particles containing titanium oxide with a rutile-type crystallite and an organosilicon compound as a binder.
    Type: Application
    Filed: October 28, 2005
    Publication date: January 29, 2009
    Applicants: SEIKO EPSON CORPORATON, CATALYSTS & CHEMICALS INDUSTRIES CO., LTD.
    Inventors: Shuji Naito, Jun Kinoshita, Yusuke Kutsukake, Katsuyoshi Takeshita, Hitoshi Mizuno, Hirokazu Tanaka, Eiko Tanaka
  • Publication number: 20080268253
    Abstract: A hard coat or a transparent film having excellent adhesion to a polycarbonate substrate is provided. The transparent film-forming coating liquid of the present invention comprises the following components (A) to (D): (A) an organosilicon compound and/or a hydrolyzate of the organosilicon compound, (B) metal oxide fine particles each of which comprises a metal oxide core particle and a coating layer composed of antimony oxide, (C) one or more curing agents (curing agent (A)) selected from the group consisting of a polythiol compound, an organic polycarboxylic acid and an acetylacetone metal complex, and (D) a curing agent (curing agent B) comprising a compound containing basic nitrogen. The metal oxide particles (B) have been surface-modified with an organosilicon compound or an amine compound.
    Type: Application
    Filed: September 1, 2005
    Publication date: October 30, 2008
    Applicant: CATALYSTS & CHEMICALS INDUSTRIES CO., LTD.
    Inventors: Sachio Murai, Yoshifumi Miyano, Hirokazu Tanaka, Eiko Tanaka
  • Patent number: 5974666
    Abstract: A charging device which is pressed against a surface of a body to be charged in a state that a voltage is applied to charge the body, having: an electrically conductive support to which a voltage is applied; an electrically conductive elastic body layer fixed on the electrically conductive support for dispersing electrically conductive particles to regulate resistance and hardness; an electrode layer provided on the electrically conductive elastic body layer, and having an electrically conductive inorganic material; and a resistance regulation layer provided on the electrode layer for regulating resistance.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: November 2, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eiko Tanaka, Hiroyuki Kataoka, Hiroshi Takayama
  • Patent number: 5839029
    Abstract: The present invention describes a charging device pressed against the surface of a body to be charged in a state of being applied with a voltage so as to charge the body. The charging device includes an electrically conductive support to which a voltage is to be applied; an electrically conductive elastic body layer fixed on the electrically conductive support; a resistance regulation layer covering the electrically conductive elastic body layer; and a protective layer laminated on the resistance regulation layer, having hardness of 6 H or more in pencil hardness, and made from a silicon compound.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: November 17, 1998
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroyuki Kataoka, Eiko Tanaka, Hiroshi Takayama
  • Patent number: 5822658
    Abstract: A charging device which is pressed against a surface of a body to be charged in a state that a voltage is applied to charge the body, having an electrically conductive support to which a voltage is applied; an electrically conductive elastic body layer fixed on the electrically conductive support for dispersing electrically conductive particles to regulate resistance and hardness; an electrode layer provided on the electrically conductive elastic body layer, and having an electrically conductive inorganic material; and a resistance regulation layer provided on the electrode layer for regulating resistance.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: October 13, 1998
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eiko Tanaka, Hiroyuki Kataoka, Hiroshi Takayama